1. Figure Legend: From: Key characteristics of specular stereo
Journal of Vision. 2014;14(14):14. doi: /
Figure Legend:
The stereo-rendering process. (A) Creating stereo images of reflective objects involves a 3-D shape model (left) illuminated by a spherical illumination map (right). Here the illumination map is unwrapped into a latitude-longitude projection. (B) The rendering process for a mirror. Point P on the surface of the object is viewed from eyes ER and EL. The pixel value at point P is determined by the reflection of the view vectors (vR, vL) around the surface normal (n) at point P. The reflected ray vectors ωL and ωR point to different locations in the illumination map, meaning that location P has different pixel values in the two images. This is shown schematically by the rainbow illumination map and the dots behind each eye. Stereograms (right) are presented for cross-fusion. (C) The rendering process for a painted shape (virtual illumination point, vIP = 0). Here the pattern of reflections is determined using a view ray from the cyclopean point (EC). Tracing out rays from EC across the whole surface produces characteristic specular distortions, which are then imaged binocularly from the two viewpoints. Note that the stereoscopic frustum is the same as in (B), the only difference is the location from which pixel intensities are determined. (D) Manipulating the virtual illumination point. Pixel intensities can be determined from any location along the interocular axis. Here the points from which to determine reflections are halfway between the eye positions and the cyclopean point.
Date of download: 11/9/2017
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